APA (7th ed.) Citation

Schaaf, W. L. (1969). Basic concepts of elementary mathematics / by W.L. Schaaf (3rd ed.). Wiley.

Chicago Style (17th ed.) Citation

Schaaf, W. L. Basic Concepts of Elementary Mathematics / by W.L. Schaaf. 3rd ed. Wiley, 1969.

MLA (9th ed.) Citation

Schaaf, W. L. Basic Concepts of Elementary Mathematics / by W.L. Schaaf. 3rd ed. Wiley, 1969.

Warning: These citations may not always be 100% accurate.